第一种:

$content=str_replace("\n","",$content);
echo $content;
或者:
$content=str_replace(array("\n","\r"),"",$content);

注:按执行效率,优先建议使用第一种方法

第二种:

$content=preg_replace("/\s/","",$content);
echo $content;

转:http://blog.csdn.net/ysdaniel/article/details/8056635

04-05 15:58